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4 Ways to Block Pesky No Caller ID Calls on Your iPhone

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Founder & Editor-in-Chief

Herby has a healthy obsession with all things technology, especially smartphones. He loves to rip things apart to see how they work. He is responsible for the editorial direction, strategy, and growth of Gotechtor.

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Imagine sitting on the couch on a relaxing Sunday night streaming your favorite show, only to have a No Caller ID pop up on your iPhone.

Pretty annoying, huh! Most of the time, you’ll ignore the call. But what if you could block all “No Caller ID” calls on your iPhone?

In this guide, we’ll show you four actionable tips for blocking unwanted calls on your iPhone once and for all.

1. Silence Unknown Callers

The simplest and easiest way to block No Caller ID calls on your iPhone is to use the Silence Unknown Callers built-in feature by following these steps:

Silence unknown caller calls on iPhone
Silence unknown caller calls on iPhone. Herby Jasmin/Gotechtor
  1. Open the Settings app
  2. Tap Phone.
  3. Tap Silence Unknown Callers.
  4. Move the Silence Unknown Callers slider to on/green.

This will automatically silence all calls from numbers not in your address book and send them to voicemail.

2. Block Calls with Do Not Disturb

Do Not Disturb is a feature that allows you to silence calls, alerts, and notifications while your device is locked. That way, you won’t be distracted by annoying notifications. 

Here’s how to set it up.

  1. Go to your phone “Settings“.
  2. Scroll Down and click Focus.
  3. At the top of the list, tap “Do Not Disturb” to turn it on. The toggle should turn green once you’ve enabled it. (there’ll be a moon icon in the status bar)
  4. While you’re there, tap “People.”
  5. You’ll see a list of options; select “Allow Call From” at the bottom.
  6. Then, select Contacts Only from the popup menu. A small check mark should appear on the left side.
Activate Focus mode on iPhone
Activate Do No Disturb Mode on iPhone. Herby Jasmin/Gotechtor

This would enable your iPhone to only ring when receiving calls from people on the address book and silence all unknown and no caller ID callers.

3. Block No Caller ID Using Contacts

Another simple way to block those “No Caller ID” calls is to create a new contact on your iPhone and name it “No Caller ID,” “No Number,” or “Do Not Answer. “

No Caller ID iPhone contact

Here’s how:

  1. Go to “Contacts” and tap the “+” sign at the top right corner.
  2. Enter 000-000-0000 for the phone number.
  3. Next, open the phone app, find the new contact you created, and select it.
  4. Scroll down and tap “Block this caller.”

A popup window will appear, explaining what happens when you block a contact. Tap “Block Contact” to confirm your decision.

You can do this a different way by following the steps below:

  1. Open the Settings app.
  2. Tap “Phone,” scroll down, and tap “Blocked Contacts.” You may see a list of blocked callers if you’ve already blocked people on your contact list.
  3. Tap “Add New…” This will take you to your Contacts list, where you can pick up the annoying caller.

By adding a contact labeled “No Caller ID” to the blocked contacts list, any incoming call without caller ID information, often associated with spammers, will automatically be directed to voicemail.

4. Block No Caller ID Calls Using Cell Phone Carriers

While iOS gives you some options to block unwanted calls, the best way to block No Caller ID is through your wireless service provider.

Here are the most popular U.S. cell phone carriers offering call filtering services.


AT&T keeps your personal data safe with the ActiveArmor app, which offers the following protections:

  1. Spam Risk Call Blocking
  2. Safe Browsing
  3. Public Wi-Fi Protection
  4. Identity Monitoring

It comes with two plans. The first is a basic version, which is free but offers limited features. The Plus version costs $3.99/month and offers more protection.


T-Mobile offers anti-scam protections, such as Scam ID, Scam Block, and Caller ID, through its proprietary app, Scam Shield.

You should have a qualifying service and a capable device to take advantage of this feature.


Verizon’s Call Filter service offers two-tier pricing. The free plan includes spam detection, blocking, and reporting.

The Call Filter Plus costs $3.99/mo for one line or $10.99/mo for 3+ lines. Visit Stop Unwanted Calls for more info.

National Do Not Call Registry

You can also register your home or mobile phones with the National Do Not Call Registry. To register:

  • Call 1.888.382.1222 (TTY: 1.866.290.4236)
  • For additional information, visit

Wrap-Up: How to Block No Caller ID Calls on iPhone

Blocking “No Caller ID” calls on your iPhone is a simple and effective solution to protect your online privacy and avoid unwanted telemarketing calls.

We hope you found this guide useful in limiting calls from private and unknown numbers so you can enjoy peace of mind.

If you have any feedback or questions, please don’t hesitate to comment below.

Get more from your contacts with the guides below:

FAQs – Block No Caller ID Calls

What does “No Caller ID” mean?

A call marked “No Caller ID” means the caller deliberately hides their phone number from the recipient. Scammers usually do this, making their calls hard to track or block.

How do I find out who called if they have no caller ID?

If someone calls you using a “No Caller ID,” the caller has deliberately blocked their phone number from being displayed. Unfortunately, there is no way to find out who called with a “No Caller ID.

Can you block a No Caller ID from ringing?

You can block No Caller ID from ringing by using your iPhone’s “Silence Unknown Callers” feature. This feature blocks all calls from numbers not stored in your contacts and sends them to voicemail.

Founder & Editor-in-Chief

Herby has a healthy obsession with all things technology, especially smartphones. He loves to rip things apart to see how they work. He is responsible for the editorial direction, strategy, and growth of Gotechtor.

Herby Jasmin

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2 thoughts on “4 Ways to Block Pesky No Caller ID Calls on Your iPhone”

  1. Unfortunately, method #2 didn’t work on an iPhone 6s on iOS14.6 (latest available).

    We created a new contact with the phone # “0000000000” and double-checked this contact is blocked and when we try to call from another cell phone with Caller ID off, it still rings with “No Caller ID”

    We changed the name of the contact to “NO CALLER ID” and it notices it still comes up “No Caller ID” so this must be a string internal to the phone.

    This explains why we can’t change the ringtone for this contact either.

    • Hey Chinarut, Thanks for dropping by. Well, that’s weird. This probably has to do with your phone. Did you try it with a different phone?


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